C#語法中的select

1、簡單的例子

代碼 class SelectSample1
{   
    static void Main()
    {           
        //Create the data source
        List<int> Scores = new List<int>() { 97, 92, 81, 60 };

        // Create the query.
        IEnumerable<int> queryHighScores =
            from score in Scores
            where score > 80
            select score;

        // Execute the query.
        foreach (int i in queryHighScores)
        {
            Console.Write(i + " ");
        }            
    }
}

 

2、集合序列化：

代碼         private XElement SerializeDesignerItems(IEnumerable<DesignerItem> designerItems)
        {
            XElement serializedItems = new XElement("DesignerItems",
                                       from item in designerItems
                                       let contentXaml = XamlWriter.Save(((DesignerItem)item).Content)
                                       select new XElement("DesignerItem",
                                 &nbs